html,body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background: #000;
    
}

#stage {
    position: absolute;
    transform-origin: 0 0;
}

#stage .layer:first-of-type {
    background: #000;
}

.layer {
    position: absolute;
    top: 0;
    left: 0;
    /* image-rendering: pixelated; 关闭抗锯齿，未测试 */
}